Dual Exhaust, How good are they?

monty9991 · 19th August 2010, 16:07

Hi,

I just came acros to the following picture of dual Exhaust for ANHC.
Just want to know how efficeint are these.

How good the secondary exhaust will be in this type pf setup.
I think the 2nd one will not be as efficient as the 1st one, unless there is a "V" spliting the exhausts.

pranavt · 19th August 2010, 16:21

All depends on the shape of the muffler inside. Most of the exhaust will flow from the RHS tailpipe though.

RedMM340 · 19th August 2010, 23:00

Dual exhausts are great for V8 engines and other large capacity motors.

For a small 4 cylinder engine, such as the Honda City, it is purely cosmetic. In fact it just adds unnecessary weight to your vehicle.

So take your pick: Either make your car look faster, or actually go faster.

Mpower · 20th August 2010, 00:51

What you have shown is more of a 'dual muffler' set up and not really a dual exhaust.

CPH · 20th August 2010, 01:06

The first one is terrible and the second one is nothing to bragg about. Both are not professional solutions. I would not want to have the box in the second picture on its own either.

monty9991 · 20th August 2010, 11:33

Quote:

Originally Posted by pranavt

All depends on the shape of the muffler inside. Most of the exhaust will flow from the RHS tailpipe though.

Thats what I think , RHS will work more but at high revs there will be no exhaust thru LHS.

Quote:

Originally Posted by RedMM340

Dual exhausts are great for V8 engines and other large capacity motors.

For a small 4 cylinder engine, such as the Honda City, it is purely cosmetic. In fact it just adds unnecessary weight to your vehicle.

So take your pick: Either make your car look faster, or actually go faster.

How about having a dual exhaut by from 2 clyinders on right and other 2 on the left? just 2 to 1?

Quote:

Originally Posted by Mpower

What you have shown is more of a 'dual muffler' set up and not really a dual exhaust.

Excatly, actually I wanted to make sure on this if its just an cosmetic setup.

Sprucegoose · 20th August 2010, 12:46

Quote:

Originally Posted by monty9991

How about having a dual exhaut by from 2 clyinders on right and other 2 on the left? just 2 to 1?

this again will be better with a V[6/8] engine.
because you will have exhaust ports coming out of each side of the engine.

In our cars with transversely mounted engines, if you split both pipes, they might end up longer and be more restrictive.

pramodkumar · 20th August 2010, 12:47

Quote:

Originally Posted by monty9991

How about having a dual exhaut by from 2 clyinders on right and other 2 on the left? just 2 to 1?

Your car would be extremely sluggish in the low mid region with very low back pressure, but amazing top end.

Pramod

pranavt · 20th August 2010, 13:25

You can do dual exhausts and still maintain exhaust velocity by using pipes of a lesser diameter. Backpressure is irrelevant, it's all about velocity. The cross section area of the pipes determines the airflow at peak exhaust velocity. Tune it for high amount of airflow and it will be bad at low RPM, tune it for medium amount of airflow and it will be restrictive at high RPM.

monty9991 · 20th August 2010, 15:06

So, in all I should stick to single exhaust type.
Will be soon opting for a Universal Magnaflow muffler for my ANHC.

What model do you guys suggest? Few of the followings are my requirements

1. Should'nt be loud I just want a nice sound.
2. Have to take this car for shopping with family.
3. Have to drive daily to office.

And does the round mufflers sound different from Ovals?

19th August 2010, 16:07	#1
monty9991 BANNED Join Date: Oct 2007 Location: Ludhiana Posts: 706 Thanked: 42 Times View My Garage	Dual Exhaust, How good are they? Hi, I just came acros to the following picture of dual Exhaust for ANHC. Just want to know how efficeint are these. How good the secondary exhaust will be in this type pf setup. I think the 2nd one will not be as efficient as the 1st one, unless there is a "V" spliting the exhausts. Attached Thumbnails Last edited by monty9991 : 19th August 2010 at 16:09.
	() Thanks

19th August 2010, 16:21	#2
pranavt Senior - BHPian Join Date: May 2008 Location: Mumbai Posts: 1,682 Thanked: 641 Times View My Garage	All depends on the shape of the muffler inside. Most of the exhaust will flow from the RHS tailpipe though.
	() Thanks

19th August 2010, 23:00	#3
RedMM340 BHPian Join Date: Apr 2008 Location: on the move Posts: 457 Thanked: 34 Times	Dual exhausts are great for V8 engines and other large capacity motors. For a small 4 cylinder engine, such as the Honda City, it is purely cosmetic. In fact it just adds unnecessary weight to your vehicle. So take your pick: Either make your car look faster, or actually go faster.
	() Thanks

20th August 2010, 00:51	#4
Mpower Senior - BHPian Join Date: Mar 2005 Location: Bangalore Posts: 10,409 Thanked: 1,730 Times View My Garage	What you have shown is more of a 'dual muffler' set up and not really a dual exhaust.
	() Thanks

20th August 2010, 01:06	#5
CPH BHPian Join Date: Jan 2010 Location: London Posts: 579 Thanked: 35 Times	The first one is terrible and the second one is nothing to bragg about. Both are not professional solutions. I would not want to have the box in the second picture on its own either.
	() Thanks

20th August 2010, 13:25	#9
pranavt Senior - BHPian Join Date: May 2008 Location: Mumbai Posts: 1,682 Thanked: 641 Times View My Garage	You can do dual exhausts and still maintain exhaust velocity by using pipes of a lesser diameter. Backpressure is irrelevant, it's all about velocity. The cross section area of the pipes determines the airflow at peak exhaust velocity. Tune it for high amount of airflow and it will be bad at low RPM, tune it for medium amount of airflow and it will be restrictive at high RPM. Last edited by pranavt : 20th August 2010 at 13:26.
	(1) Thanks

20th August 2010, 15:06	#10
monty9991 BANNED Join Date: Oct 2007 Location: Ludhiana Posts: 706 Thanked: 42 Times View My Garage	So, in all I should stick to single exhaust type. Will be soon opting for a Universal Magnaflow muffler for my ANHC. What model do you guys suggest? Few of the followings are my requirements 1. Should'nt be loud I just want a nice sound. 2. Have to take this car for shopping with family. 3. Have to drive daily to office. And does the round mufflers sound different from Ovals?
	() Thanks